Authorities say Brown sped off in November 2014 when Cedar County Deputy Matthew Chism tried to stop him for a traffic violation. Chism chased the vehicle through El Dorado Springs, where 28-year-old William Collins jumped out as the car drove away. Chism and Collins fought before exchanging gunfire that killed both of them.

Charging documents say Brown knew there was a semi-automatic pistol inside the vehicle while fleeing. Brown previously was found guilty of second-degree murder, but the conviction was overturned in 2016. He's imprisoned for drug distribution and evidence tampering.